Is there a strategy to increase my rating?
A rating can increase by playing well against higher-rated or lower-rated opponents. Ratings changes are not as much about the level of player against whom a player competes, but instead about whether a player exceeds the expectations of a result in a given match based on the relative ratings of the players. Game scores (3-0, 3-1, 3-2) do matter in the algorithm's rating calculation from a match result.